Einstein's theory of relativity is used in modern society for space development and GPS. It is impossible to argue with the correctness of the theory.
Personally, however, I have a doubt.
The theory of relativity is based on the idea that the speed of light is constant and unchanging, and that this unchanging nature is the key to solving various relative phenomena.
Therefore, phenomena beyond the speed of light cannot be defined. It is not that we deny the existence of superluminal speed, but we cannot define it.
In some cases, this is the reason why people declare that nothing can exceed the speed of light.
I think. I think that the reason we can't exceed the speed of light is because we don't have the driving force to do so, not because we can't.
As another analogy, the speed of sound = Mach is the maximum speed at which air can move, but supersonic jets and rockets, for example, have achieved flight at speeds exceeding the speed of sound by injecting hot gas. Similarly, if there was a way to exceed the speed of light, super-light speed propulsion would be possible.
In reality, though, we have not discovered anything that moves at the speed of light.
.... If anti-gravity propulsion is realized, let's assume that the propulsion system can reach 90% of the speed of light.
Three sub-lightspeed propulsion devices - shaped like a squashed cyclotron or a fan without wings *1 - are placed at 90 degrees in each of the XYZ axes, and connected at the origin.
Then, the composite vector of thrust will be three times the velocity of the root from the meeting point of the three axes. With 90% of the speed of light x route 3 (about 1.7 times), we can calculate 1.5 times the speed of light. This is the three-axis combined force propulsion system of the title.
When the speed of sound is exceeded, shock waves spread out in the form of a triangular pyramid. When the speed of superluminal light is reached by 3-axis propulsion, space will be similarly torn into a triangular pyramid, and the shock waves will be detected as gravity waves.
Also, since space cannot keep up with the speed of superluminal light, the inside of the triangular pyramid will be in a state of super vacuum. Even if there is pair production, most of it will soon disappear and be released in the form of light energy, which means that when we reach superluminal speed, the light cone will glow for a moment, and it will be very beautiful.
In Star Trek TNG, the moment the Enterprise-D enters warp, it becomes infinitesimally small and at the same time glows for a moment.
Just before reaching superluminal speed, matter cannot keep up with the speed, so it is compressed to infinity. Originally, atoms are more than 99% space, so this will shrink to the limit. If we were on a super-light speed spaceship, we would become tiny, about the size of a virus. If the spacecraft is compressed too much, the electrons will get stuck in the nucleus and become neutrons.
As a matter of fact, I doubt that it is really possible to control the speed of superluminal light.
The electricity flowing through the electronic circuitry is at the speed of light, so I think we'll have to devise some way to control it. I've heard that you can't change direction while at warp, but I wonder if that's because it's too fast to control, and you'd end up in a flash flood.
If a sublight speed propulsion system were to be developed, I would definitely like to try this three-axis combined force propulsion.
Even if it is not superluminal speed, if the composite vector is 1.7 times faster, the propulsion system should be able to generate about 58% of the speed of light, and with three-axis combined force propulsion, it will reach almost 99% of the speed of light (58% x 1.7), which makes it easier to control the propulsion system.
*1: I secretly read this as "GEE drive". GEE stands for "Gravity Efect Engine". GEE is an abbreviation for Gravity Efect Engine, which translates to "Gravity Effect Engine" in Japanese. "GEE looks like the warp nacelle of a spaceship in Sue Oreck, so I'm looking forward to the possibility of a GEE-powered spaceship someday.
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